Medicine: Brain Healing

Brain damage is forever, or so doctors once thought, but that
longstanding medical axiom is now being proved wrong. In laboratories
across the U.S. and Europe, researchers are finding that by creating
the right chemical environment, and in some cases implanting new cells
in the brain, damaged nervous systems can be coaxed to regenerate. Even
more encouraging is the discovery, so far shown only in animals, that
cellular regrowth can restore lost mental functions, and, in addition,
improve memory and learning.